| packages/nixpkgs/haskellPackages.happlets | "Haskell Applets" provides an event handler and a canvas for building simple GUI apps |
| packages/nixpkgs/haskellPackages.classy-effects | An interface for a handler-independent, typeclass-based effect system |
| packages/nixpkgs/haskellPackages.classy-effects-base | An interface for a handler-independent, typeclass-based effect system |
| packages/nixpkgs/haskellPackages.hack-frontend-monadcgi | Allows programs written against MonadCGI to run with any hack handler. (deprecated) |
| packages/nixpkgs/haskellPackages.mailchimp-subscribe | MailChimp subscription request handler |
| packages/nixpkgs/haskellPackages.HandlerSocketClient | Haskell implementation of a HandlerSocket client (API) |